javax.persistence.jdbc.dialect, javax.persistence.jdbc.driver, javax.persistence.jdbc.url, javax.persistence.jdbc.user, javax.persistence.jdbc.password and maybe some other standard JPA properties (javax.persistence.jdbc.schema?) aren't taken into account. I try to use them to replace the hibernate-specific properties in order to ease the comparison between several EJB/JPA implementations. I used these ones:
hibernate.dialect, hibernate.connection.driver_class, hibernate.connection.url, hibernate.connection.username, hibernate.connection.password.

Some exceptions are thrown when creating the entity manager factory as you can see in the enclosed files.

As you can see here, Hibernate only looks for the dialect by using only its specific property name:
https://github.com/hibernate/hibernate-orm/blob/master/hibernate-core/src/main/java/org/hibernate/engine/jdbc/dialect/internal/DialectFactoryImpl.java#L66